How to use index passes in other compositing packages?
To make it work in all other packages you need to manually create custom output channels and append the passes to your Multilayer EXR via Blenders Compositor:





In Nuke you can use J_Ops. With this tool you don't need the additional node setup above. There is a tool called J_GotSomeID which is able to detect such IDs from the EXR Multilayer automatically.


Select the pass (IndexOB or IndexMA)
Set the Selection Mode to Find
To detect the IDs click Autofill